A worked example: 8 kW in Phoenix
An 8 kW system — about 19 × 425-watt panels — at Phoenix's assumed installed cost of $2.25–$2.95 per watt runs roughly $18,000–$23,600 before incentives. At about 1,750 kWh per installed kW, it would generate around 14,000 kWh per year. Valuing self-consumed electricity at the assumed $0.16/kWh retail rate and exports conservatively, first-year savings land near $1,846 — a simple payback of roughly 10–13 years.
No federal tax credit is included: the Section 25D residential credit ended for systems installed after December 31, 2025.
Average cost of solar panels in Phoenix by system size
At the Phoenix market rate of $2.25–$2.95 per watt, using the local production factor rather than the Arizona average:
| System size | Panels | Installed cost | Annual production | Est. payback |
|---|---|---|---|---|
| 6 kW | 15 | $13,500–$17,700 | 10,500 kWh | 10–13 yrs |
| 8 kW | 19 | $18,000–$23,600 | 14,000 kWh | 10–13 yrs |
| 10 kW | 24 | $22,500–$29,500 | 17,500 kWh | 10–13 yrs |
| 12 kW | 29 | $27,000–$35,400 | 21,000 kWh | 10–13 yrs |
Over a 25-year life, solar electricity in Phoenix comes to roughly 5.5¢–7.2¢ per kilowatt-hour, against a local retail rate assumed at 16.0¢.
How Phoenix differs from the Arizona average
Statewide averages blend climates, utilities and installer markets that can differ sharply within a single state — which is why a Phoenix estimate is not simply the Arizona number.
| Assumption | Phoenix | Arizona average |
|---|---|---|
| Electricity rate | $0.16/kWh | $0.16/kWh |
| Production (kWh/kW/yr) | 1,750 | 1,720 |
| Installed cost per watt | $2.25–$2.95 | $2.35–$3.10 |
| 8 kW system cost | $18,000–$23,600 | $18,800–$24,800 |
| Estimated payback | 10–13 yrs | 10–14 yrs |
APS (Arizona Public Service) and solar exports
Most of Phoenix proper is served by APS, which credits exported solar under a Resource Comparison Proxy export rate that steps down roughly 10% a year and sits well below retail. Parts of the metro (Tempe, Mesa, Scottsdale, Chandler) are SRP territory instead, where solar customers move to a demand-based price plan — a materially different calculation. Confirm which utility serves the address before comparing quotes.
Statewide, arizona replaced retail net metering with net billing. Utilities such as APS and SRP credit exported solar at an export rate below retail that can step down annually, so self-consumption drives most savings.
Local factors that change a Phoenix solar quote
Summer air-conditioning load peaks in the late afternoon, right as production falls off, which is what makes batteries and time-of-use plan choice matter more in Phoenix than in most markets. Extreme roof temperatures also reduce panel efficiency relative to the nameplate rating, and many neighborhoods have tile roofs that raise labor cost versus asphalt shingle.
Beyond location, equipment, roof condition, electrical upgrades, permitting, labor, system size, batteries and financing all move the installed price.
Solar incentives available in Phoenix
Arizona offers a state income tax credit of 25% of system cost up to $1,000, plus sales and property tax exemptions for residential solar. Verify current program terms.
There is no federal residential credit for systems installed in 2026, so state, local and utility programs are now the entire incentive picture for a purchased system. See the full Arizona solar incentives guide.
Frequently asked questions
What is the average cost of solar panels in Phoenix?
Averaging the Phoenix market at $2.25–$2.95 per watt installed, a 6 kW system runs $13,500–$17,700, an 8 kW $18,000–$23,600, and a 10 kW $22,500–$29,500, all before incentives. Over a 25-year life that is roughly 5.5¢–7.2¢ per kilowatt-hour, against a local retail rate assumed at 16.0¢.
How much does it cost to install solar panels in Phoenix?
The per-watt figures above are turnkey: panels, inverter, racking, labor, permitting and interconnection. What moves a Phoenix quote away from them is local: Summer air-conditioning load peaks in the late afternoon, right as production falls off, which is what makes batteries and time-of-use plan choice matter more in Phoenix than in most markets. Extreme roof temperatures also reduce panel efficiency relative to the nameplate rating, and many neighborhoods have tile roofs that raise labor cost versus asphalt shingle. Roof complexity and a main-panel upgrade are the other two big swings, and only a site visit settles either.
How much do solar panels cost in Phoenix, AZ?
At an assumed installed cost of $2.25–$2.95 per watt for the Phoenix market, a typical 8 kW home system runs roughly $18,000–$23,600 before incentives — about 19 panels at 425 watts each. That is 5% below the Arizona statewide assumption, reflecting local installer competition.
How much electricity does a solar system produce in Phoenix?
We assume about 1,750 kWh per installed kW per year in Phoenix — so an 8 kW system generates roughly 14,000 kWh annually. That is 2% above the Arizona average, because statewide figures blend climates that can differ sharply within one state.
Is solar worth it in Phoenix?
With electricity around $0.16/kWh and 1,750 kWh/kW of annual production, an 8 kW system in Phoenix could save roughly $1,846 in year one — a simple payback of about 10–13 years with no federal tax credit. Whether that clears your bar depends on your rate plan, how much of the output you use on site, your roof, and how long you plan to stay.
Who is the electric utility in Phoenix and how does it pay for solar exports?
APS (Arizona Public Service). Most of Phoenix proper is served by APS, which credits exported solar under a Resource Comparison Proxy export rate that steps down roughly 10% a year and sits well below retail. Parts of the metro (Tempe, Mesa, Scottsdale, Chandler) are SRP territory instead, where solar customers move to a demand-based price plan — a materially different calculation. Confirm which utility serves the address before comparing quotes.
Is there still a federal solar tax credit in Phoenix?
No — the 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025 under the One Big Beautiful Bill Act. None of the figures on this page include it. Leased or PPA systems may still benefit indirectly, because the system owner can claim the commercial 48E credit through 2027.
Use this as a starting point
These are broad local assumptions, not a market survey of Phoenix installers or a binding quote. Before purchasing, verify applicable incentives, your specific utility tariff, installer licensing, warranties and financing terms.
Where these numbers come from
Local assumptions are informed by public data and reviewed periodically (September 2026):